<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Document</title>
  <style>
    .box {
      width: 300px;
      height: 300px;
      background-color: red;
    }
  </style>
</head>

<body>
  <input type="text" id="ipt" />
  <script>
    const oIpt = document.getElementById("ipt");

    function center(e) {
      console.log("发送数据");
      console.log(e);
      console.log(this);
    }
    oIpt.onkeyup = debounce(center, 500);
    function debounce(fn, time) {
      let timer = null;
      return function (e) {
        clearTimeout(timer);
        timer = setTimeout(() => {
          center.call(this, e);
        }, time);
      };
    }
  </script>
</body>

</html>